SB20260905130 - NULL pointer dereference in Linux kernel iommu iommufd driver
Published: September 5, 2026
Security Bulletin ID
SB20260905130
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-80817)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a race condition in iommufd_ioas_change_process() when processing IOAS areas concurrently with iopt_map_file_pages(). A local user can trigger the race to cause a denial of service.
Remediation
Install update from vendor's website.